Charles s



Lettersjlatcnt .2%.` 79,708, dated July 7,1868.

' IMPROVEMENT' IN Low-WATER INDICATOR.'-

*Q`Llge-5tlgettli-rtfcrrth 'tu in that' ettersw'iuteutnnt making part ut the smite.

T0 ALL WHOMIv IT .MAY GOILCERN:V y

.Be it known 'that I, CHARLESV'S. Ws'rsorapf the cit'yfand count-y of Philadelphia, andState-of Pennsylvenia, :have invented la. new and useful Improvementein Lcjm-llfater'` Indicators; and'I do hereby declare that the following is a full `andgczcactdescription' thereofreference*being had to the accompanying drawings, and to the letters Yof reference marked thereon, 4 y

v The nature of 1 ny invention 4con'sists'in the combination of' an oscillatingV vessel, which is divided .into two parte by a central partition, with a stationaryY receiver, that is' provided with a'whistle, and hasten open communication v with the water inthe boiler by means of a vertical pipe, the lower end of which is placed at a point where the alarm shouldbe given, so that the water runs. out of the pipe and the receiver, and steam'takes its place when the waterin the boiler descends'below the-end `of the pipe. One part of the said oscillating vessel has an open-communication with the receiver at top, so as Vto be always'weighted with \vaterand the other 4partv has its communicationwithl the receiver at its lower side, and is' so weighted, by the addition of metal, as to bring the central partition on an dangle'when both parts of the 'vessel are filled with water. .When the water in the -rcceiver has descended to the opening in the lower sideofthe latter-dcseribed,part, the vater in it descends withthe water in the receiver to'the boiler, and steam tuhes-V its place, so that said part has been so lightened as to give preponderance of weight'to the otherside oi' the' oseillating vessel, and the central partition comingintoa perpendicnlarjposition thereby, bears kagainst the handle oui" a lever which protrudes through tlf-e opening in the upper side of lthe-vessel, and opens avalve, whereby steuern, which hasby thistimo filled the receiver, ruelles into the whistle and'gives'thealarm. l

The peculiar construction of the apparatus will b e understood by the following description."

The accompanying drawing represents a -vertical sectionfof the indicator. h

A is a spherical receiver, whichl has communication, with the boiler byvmeans. of a vertical pipe, the upper end of which is screwed into the opening `t of the receiver, and the lower end extends into the boiler, to the'poilit where the water hasdescended' when-thc alarm `should be'given. The base, b, of the whistle B is screwed into the opening c ofthe receiver. I i v A C is a vessel, 'which oscillateson its journals, 0l, in openings in 'the opposite sides of the receiver. 'lhesaid vessel is dividedinto two equalfparts, 1 2, by the central partition e.v The part'l has an open communi-` cation with the receiver by'nieans of ,the openiglf in its upper side, so as to` receive water/therefrom, and be nearlyful'l when thewater 'is discharged from the part 2 through` the opening f in thelower part thereof, as

hereinafter described.

The part 2 is-weiglxtenl` by means of the'lug g, or in any -other 'convenient manner, so as to cause the vessel` C-to turn partly around when both'rparts are full of water and bring the central partition e on an' angle, as rep-v resented in the drawings.'

4 When the water in the boiler-descends to the lower end ofthe pipe which 'coinmnnicates with the receiver, l the steam ascends the same and takes the place of the water i'n the receiver A. When the water in the latter hasldcscended as far as the openingf in the' part 2 ofthe vessel C, the communication being thereby made with the steam in thc receiver, stcamrushes into said part andtakes 'the place ofthe water, ywhich descends into the boiler with the water in the'lower'part ofthe receiver. vv .lhisgives preponderance to thepart 1`of the vessel which causes it to turn partly around, sb.that the central' partition e shall' assume a perpendicular position,

indicated by red lines. When the p'rtition hasnearly'reached this position, it bears against the handle fof the lever D, so as to open the valve E, :millet steani from the lreceiver A into` the whistle,l and give the alarm indicating low water in the holler'.V

cam, or otherwise.

When the boiler isagain supplied with water,the receiver isrelillcd with the same through the commui nicating pipe,V and thosvater being thereby caused; to pass-through the opening j" of the part 2 of the vessel C,

'lhc lever may be dispcnsedwith, and the'valve raised bythe direct-action of the vessel C by means of a andiill said part, it again becomes heavier than the .part 1, whereby the vessel is caused to turn back into its former-position, represented in the drawings.' p

AIfprovide for the escap'e of the air in the part 2, to admit of, its being filled 'with water, by means of the valve F, whichis borne'up by the pressure of the air in said part, and held in its upward position until the air is expelled by the ascent of the water, and the part is filled with the latter. The valve is then brought back by its own'iveight upon its seat,

As the vessel C comes into the position itfassnmes iri the -drawings,the rear edge of tho opening f bears againstthe han'dle ofthe lever D, in timeto reverse its motion and close the valve E. The* vessel remuinsin this positionbefore the giving of each alarm, in the manner above described, until the water in the receiver A has descended' to the opening f', and the upperpart of the receiver is filled with steam, whereby the alarm is given byv means of dry steam.

There isa valve, G, in the lower side of the part 1 of the' vessel C', which is opened upwards by the end of itsl stem, h, bearing on the bridge H, as the partition e comes in'to its vertical position, to allow of the-escape of the water-from said part 1, and give a preponderance to the part 2 of the vessel, so that it mayregain its former position when the alarm has been sounded a suicient length-of time by the whistle B, and closethe valve E, and thus get' rid of the extension of the noise beyond the time required. If desired, a lever may be conected with the stem h, lto bear upon the bridge H, instead of having the action directv with the stem.

. -Invthe drawings, the receiver A and oscillating vessel C are represented of spherical form, but I do not con- {ine myself to this construction, as other forms may answer as well. Y V

What I claim as my invention, and desireto secure by Letters Patent, is y 1. The combination of the oscillating vessel C, constructed substantially as described, -with the receiver A, lever D, and valve E, substantially in the mannerabove set forth, and for the purpose specified.

2. The construction of the part 2 of the oscillating vessel C with the valve F, to provide for the escape of air from the same, so that water may ascend into and llit, as above described.

3. The combination and arrangement of the valve G with the part 1 of the vessel C and the bar H, substantially as land for the purpose set forth. y v

In testimony that the above i's my invention, I have hereunto set my hand and aixed my seal, this 7th day of May, '1868. l l

GHAS. S. WISON. [1.. s.]

Witnesses:l

SrEPnEN Ustrrcx, JonN WHITE. 

